<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <!--引入Vue-->
  <script type="text/javascript" src="../js/vue.js"></script>
  <title></title>
</head>

<body>
  <!--准备好一个容器-->
  <div class="root">
    <input type="text" placeholder="请输入名字" v-model="keyWord">
    <button @click="sortType=2">年龄升序 </button>
    <button @click="sortType=1">年龄降序 </button>
    <button @click="sortType=0">原顺序 </button>

    <ul>
      <li v-for="p in filPersons" :key="p.id">
        {{p.name}}-{{p.age}}--{{p.sex}}
      </li>
    </ul>
  </div>

  <script type="text/javascript">
    Vue.config.productionTip = false;

    new Vue({
      el: '.root',
      data: {
        keyWord: '',
        sortType:0,
        persons: [
          { id: '001', name: '马冬梅', age: 19, sex: '女' },
          { id: '002', name: '周冬雨', age: 20, sex: '女' },
          { id: '003', name: '周杰伦', age: 21, sex: '男' },
          { id: '003', name: '温兆伦', age: 22, sex: '男' }
        ]
      },
      computed:{
        filPersons(){
          const arr= this.persons.filter((p)=>{
            return p.name.indexOf(this.keyWord)!==-1
          })
          //判断一下是否需要排序
          if(this.sortType){
            arr.sort((a,b)=>{
              return this.sortType===1?b.age-a.age:a.age-b.age
            })  
          }
          return arr
        }

      }
    })
  </script>
</body>

</html>